1118275791 has 8 divisors (see below), whose sum is σ = 1495098624. Its totient is φ = 743485080.

The previous prime is 1118275783. The next prime is 1118275853. The reversal of 1118275791 is 1975728111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1118275791 - 2³ = 1118275783 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1118275751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 506745 + ... + 508946.

It is an arithmetic number, because the mean of its divisors is an integer number (186887328).

Almost surely, 2^1118275791 is an apocalyptic number.

1118275791 is a deficient number, since it is larger than the sum of its proper divisors (376822833).

1118275791 is a wasteful number, since it uses less digits than its factorization.

1118275791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016061.

The product of its digits is 35280, while the sum is 42.

The square root of 1118275791 is about 33440.6308403415. The cubic root of 1118275791 is about 1037.9656332710.

The spelling of 1118275791 in words is "one billion, one hundred eighteen million, two hundred seventy-five thousand, seven hundred ninety-one".